Used Universal Audio Ruby Top Boost Amplifier '63 Guitar Preamp

Used and in good condition, the Universal Audio Ruby '63 Top Boost Amplifier delivers the unmistakable tone of classic British tube amps with exceptional authenticity and precision. Built on Universal Audio’s trusted UAFX dual-engine processing, this preamp brings detailed richness and clarity, enhanced by onboard speaker cabinet emulation and room modeling for a lifelike sonic experience. Its vintage-style controls—Volume, Treble, and Bass—along with selectable Brilliant, Normal, and Vibrato channel voicings, provide players with a versatile tonal palette. Designed to fit seamlessly into modern rigs with stereo inputs and outputs, USB-C for firmware updates, and true or buffered bypass, the Ruby '63 offers professional-grade reliability and performance for musicians who want iconic top boost tones in a compact pedal format.